His biological parents died during World War II and he was subsequently adopted by his maternal uncle Francisco Sablan Pangelinan.
In the 1960s, Pangelinan joined the Popular Party owing to his belief in reintegrating Guam and the Northern Mariana Islands.
[1] He returned to Saipan and became an elementary school teacher before joining the Trust Territory of the Pacific Islands as an accountant.
Carlos S. Camacho was elected governor and appointed Pangelinan, a supporter, as an advisor with the title Special Assistant for Administration and Finance.
[3] He and fellow incumbent Egredino Jones, running on the Commonwealth Popular Democratic Party slate,[4] lost their seats in the 6th district to Republicans Jose R. Lifoifoi and Juan B. Camacho in a strong year for the Republican Party.